Unit Convert API

POST https://api.findutils.com/api/tools/unit-convert/execute

Convert between length, weight, volume, area, speed, and temperature units (km/mi/m/ft, kg/lb, L/gal, m²/ha/acre, mph/kph/knot, °C/°F/K).

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Request body

application/json

value

number required

Numeric value to convert.
from

string required

Source unit (e.g. "km", "lb", "C").
to

string required

Target unit.
category

string optional

length, weight, data, area, speed, volume or temperature. Detected from the units when omitted. One of length · weight · data · area · speed · volume · temperature.

Example arguments

Verified

{
  "value": 1,
  "from": "km",
  "to": "mi"
}

curl -X POST https://api.findutils.com/api/tools/unit-convert/execute \
  -H "Content-Type: application/json" \
  -d '{
    "value": 1,
    "from": "km",
    "to": "mi"
  }'

const response = await fetch('https://api.findutils.com/api/tools/unit-convert/execute', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({"value":1,"from":"km","to":"mi"}),
});
const data = await response.json();

import requests

response = requests.post(
    "https://api.findutils.com/api/tools/unit-convert/execute",
    json={"value":1,"from":"km","to":"mi"},
)
data = response.json()

$ch = curl_init('https://api.findutils.com/api/tools/unit-convert/execute');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
    CURLOPT_POSTFIELDS => '{"value":1,"from":"km","to":"mi"}',
    CURLOPT_RETURNTRANSFER => true,
]);
$data = json_decode(curl_exec($ch), true);

Also an MCP tool

Call unit_convert from Claude, Cursor or any MCP client. Same arguments, same output.

https://mcp.findutils.com

MCP reference

Rate limit: 60 a minute, per IP
Auth: None
REST id: unit-convert
MCP name: unit_convert
Category: Calculators
Machine-readable: openapi.json · markdown.md

Request body

Example arguments

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